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Merge pull request #921 from JordanMaples/not_null-changes

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not_null improvements
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Jordan Maples [MSFT] 2020-08-26 17:48:26 -07:00 committed by GitHub
commit 6c518638ac
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1 changed files with 3 additions and 4 deletions
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7
include/gsl/pointers
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@ -72,7 +72,7 @@ public:
} }
template <typename = std::enable_if_t<!std::is_same<std::nullptr_t, T>::value>> template <typename = std::enable_if_t<!std::is_same<std::nullptr_t, T>::value>>
constexpr not_null(T u) : ptr_(u) constexpr not_null(T u) : ptr_(std::move(u))
{ {
Expects(ptr_ != nullptr); Expects(ptr_ != nullptr);
} }
@ -84,15 +84,14 @@ public:
not_null(const not_null& other) = default; not_null(const not_null& other) = default;
not_null& operator=(const not_null& other) = default; not_null& operator=(const not_null& other) = default;
constexpr std::conditional_t<std::is_copy_constructible<T>::value, T, const T&> get() const
constexpr T get() const
{ {
Ensures(ptr_ != nullptr); Ensures(ptr_ != nullptr);
return ptr_; return ptr_;
} }
constexpr operator T() const { return get(); } constexpr operator T() const { return get(); }
constexpr T operator->() const { return get(); } constexpr decltype(auto) operator->() const { return get(); }
constexpr decltype(auto) operator*() const { return *get(); } constexpr decltype(auto) operator*() const { return *get(); }
// prevents compilation when someone attempts to assign a null pointer constant // prevents compilation when someone attempts to assign a null pointer constant